add wallpaper support fix #19

HLab/Windows.API/WinAPI_SetupAPI.cs

@@ -50,7 +50,7 @@ public SP_DEVINFO_DATA(bool init)
 
         public static Guid GUID_CLASS_MONITOR = new Guid(0x4d36e96e, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18);
         const int MAX_DEVICE_ID_LEN = 200;
-        const int MAX_PATH = 260;
+        public const int MAX_PATH = 260;
 
         public const int DIGCF_PRESENT = 0x2;
         public const int DIGCF_PROFILE = 0x8;

HLab/Windows.API/WinAPI_User32.cs

@@ -1582,5 +1582,11 @@ public struct AccentPolicy
             public int GradientColor;
             public int AnimationId;
         }
+
+        public const uint SPI_GETDESKWALLPAPER = 0x73;
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        public static extern int SystemParametersInfo(UInt32 uAction, int uParam, string lpvParam, int fuWinIni);
+
     }
 }

HLab/Windows.Monitors/DispalyChangesView.xaml.cs

@@ -38,6 +38,10 @@ private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam
         {
             var message = (WindowMessage)msg;
             var subCode = (WindowMessageParameter)wParam.ToInt64();
+            if (message == WindowMessage.WM_WININICHANGE)
+            {
+                //MonitorsService.D.UpdateDevices();
+            }
 
             if (message == WindowMessage.WM_DISPLAYCHANGE /*|| message == WindowMessage.WM_WININICHANGE*/)
             {

LittleBigMouse/Control.Core/ScreenFrameView.xaml

@@ -189,6 +189,10 @@
                     </ContentControl.Effect>
                 </ContentControl>
             </Grid>
+
+            <Grid Grid.Column="1" Grid.Row="1" Background="{Binding BackgroundColor}"/>
+
+            <ContentControl Grid.Column="1" Grid.Row="1" Content="{Binding WallPaper}"/>
 
             <mvvm:ViewLocator 
                 Grid.Column="1" Grid.Row="1" 

LittleBigMouse/Control.Core/ScreenFrameViewModel.cs

@@ -20,10 +20,13 @@ You should have received a copy of the GNU General Public License
 	  mailto:mathieu@mgth.fr
 	  http://www.mgth.fr
 */
+
+using System;
 using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
+using System.Windows.Media.Imaging;
 using HLab.Mvvm;
 using HLab.Notify;
 using LittleBigMouse.ScreenConfigs;
@@ -155,6 +158,51 @@ public Viewbox Logo
             get => this.Get<Viewbox>(); private set => this.Set(value);
         }
 
+        [TriggedOn("Model.Config.WallpaperStyle")]
+        public Stretch WallPaperStretch => this.Get(() =>
+        {
+            switch (Model.Config.WallpaperStyle)
+            {
+                case 0:
+                    return Stretch.None;
+                case 2:
+                    return Stretch.Fill;
+                case 6:
+                    return Stretch.Uniform;
+                case 10:
+                    return Stretch.UniformToFill;
+                case 22: // stretched across all screens
+                default:
+                    return Stretch.None;
+            }
+        });
+
+        [TriggedOn(nameof(WallPaperStretch))]
+        [TriggedOn("Model.Config.WallPaperPath")]
+        public Image WallPaper => this.Get(() =>
+        {
+            try
+            {
+                return new Image
+                {
+                    Source = new BitmapImage(new Uri(Model.Config.WallPaperPath)),
+                    Stretch = WallPaperStretch,
+                    HorizontalAlignment = HorizontalAlignment.Center
+                };
+            }
+            catch (Exception)
+            {
+                return null;
+            }
+        });
+
+        public Brush BackgroundColor => this.Get(() => new SolidColorBrush(
+            Color.FromRgb(
+                (byte)Model.Config.BackGroundColor[0],
+                (byte)Model.Config.BackGroundColor[1],
+                (byte)Model.Config.BackGroundColor[2]
+            )));
+
         [TriggedOn(nameof(Model),"Monitor","Edid","ManufacturerCode")]
         public void UpdateLogo()
         {

LittleBigMouse/ScreenConfig/Screen.cs

@@ -1079,6 +1079,8 @@ public void PlaceAuto(IEnumerable<Screen> screens)
                 else InMm.Y -= bottom;
             }
         }
-    }
+
+
+}
 }
 

LittleBigMouse/ScreenConfig/ScreenConfig.cs

@@ -31,6 +31,7 @@ You should have received a copy of the GNU General Public License
 using System.Management;
 using System.Windows;
 using HLab.Notify;
+using HLab.Windows.API;
 using HLab.Windows.Monitors;
 using Microsoft.Win32;
 using Newtonsoft.Json;
@@ -93,12 +94,63 @@ public ScreenConfig(IMonitorsService monitorsService) : base(false)
         {
             this.SubscribeNotifier();
 
+            SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged;
+
             MonitorsOnCollectionChanged(monitorsService.AttachedMonitors,
                 new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, MonitorsService.D.AttachedMonitors));
 
             monitorsService.AttachedMonitors.CollectionChanged += MonitorsOnCollectionChanged;
         }
 
+        private void SystemEvents_UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e)
+        {
+            Notifier.Update(GetType().GetProperty("WallPaperPath"));
+        }
+
+        public string WallPaperPath => this.Get(GetCurrentDesktopWallpaper);
+
+        public string GetCurrentDesktopWallpaper()
+        {
+            string currentWallpaper = new string('\0', NativeMethods.MAX_PATH);
+            NativeMethods.SystemParametersInfo(NativeMethods.SPI_GETDESKWALLPAPER, currentWallpaper.Length, currentWallpaper, 0);
+            return currentWallpaper.Substring(0, currentWallpaper.IndexOf('\0'));
+        }
+
+        public bool TiledWallPaper => this.Get(() =>
+        {
+            using (var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", false))
+            {
+                if (key == null) return false;
+                return key.GetValue("WallpaperStyle","0").ToString() == "1";
+            }
+        });
+
+        public int WallpaperStyle => this.Get(() =>
+        {
+            using (var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop", false))
+            {
+                if (key == null) return 0;
+
+                if(int.TryParse(key.GetValue("WallpaperStyle","0").ToString(),out var value))
+                {
+                    return value;
+                }
+                return 0;
+            }
+        });
+
+        public int[] BackGroundColor => this.Get<int[]>(() =>
+        {
+            using (var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Colors", false))
+            {
+                if (key == null) return new []{0,0,0};
+                var s = key.GetValue("Background", "0 0 0").ToString();
+                var ss = s.Split(' ');
+                var i = ss.Select(int.Parse).ToArray();
+                return i;
+            }
+        });
+
         private void MonitorsOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
         {
             if (args.NewItems != null)